Using guix commit 243512d984e1b870d3b77b2759698a64ed723fea. Also fails with previous guix revisions. Full output: Computing Guix derivation for 'x86_64-linux'... /@ substituter-started /gnu/store/9ph7spq3b72fv4scqqzwxalb8n0wc6xn-graphviz-2.42.3-doc substitute -following redirection to `https://ci.guix.gnu.org/nar/lzip/9ph7spq3b72fv4scqqzwxalb8n0wc6xn-graphviz-2.42.3-doc'... Backtrace: In ice-9/boot-9.scm: 1736:10 4 (with-exception-handler _ _ #:unwind? _ # _) In unknown file: 3 (apply-smob/0 #) In ice-9/boot-9.scm: 718:2 2 (call-with-prompt _ _ #) In ice-9/eval.scm: 619:8 1 (_ #(#(#))) In guix/ui.scm: 1949:12 0 (run-guix-command _ . _) guix/ui.scm:1949:12: In procedure run-guix-command: In procedure put-string: Wrong type argument in position 1 (expecting open output port): # @ substituter-failed /gnu/store/9ph7spq3b72fv4scqqzwxalb8n0wc6xn-graphviz-2.42.3-doc 256 fetching path `/gnu/store/9ph7spq3b72fv4scqqzwxalb8n0wc6xn-graphviz-2.42.3-doc' failed with exit code 1 @ substituter-started /gnu/store/adx3hrrgjs0n55zm4i4p5kv6yj0q3bhq-guile-ssh-0.13.1-debug substitute killing process 4025 Backtrace: 11 (primitive-load "/gnu/store/f2ymnsn7d0jv9p8alj4mrg4dpw2fr5vn-compute-guix-derivation") In ice-9/eval.scm: 155:9 10 (_ _) 159:9 9 (_ #(#(#(#(#(#(#(#(#(#(#(#(#(# ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?) ?)) In ./guix/store.scm: 2049:24 8 (run-with-store # _ #:guile-for-build _ #:system _ #:target _) 1883:8 7 (_ _) In ./guix/gexp.scm: 258:18 6 (_ _) 1123:2 5 (_ _) 982:2 4 (_ _) 843:4 3 (_ _) In ./guix/store.scm: 1931:12 2 (_ #) 1358:5 1 (map/accumulate-builds # _ _) 1369:15 0 (_ # 7fc0406ba5f0> _ _) ./guix/store.scm:1369:15: ERROR: 1. &store-protocol-error: message: "some substitutes for the outputs of derivation `/gnu/store/d879bxb47cnzkgsl37478aa4mmp7cjdg-graphviz-2.42.3.drv' failed (usually happens due to networking issues); try `--fallback' to build derivation from source " status: 1 guix pull: error: You found a bug: the program '/gnu/store/f2ymnsn7d0jv9p8alj4mrg4dpw2fr5vn-compute-guix-derivation' failed to compute the derivation for Guix (version: "4cf3734c56d669ee2d78082e5d7c4d0a58e0f800"; system: "x86_64-linux"; host version: "243512d984e1b870d3b77b2759698a64ed723fea"; pull-version: 1). Please report it by email to .